Whatever his personal failings and those of his Order, the prior of the Hospital of St. John of Jerusalem, more than any other man in England in the late Middle Ages, stood for the political standards that were most respected, if not most often acted upon, by his fellow-countrymen. He was also one of die great magnates of the kingdom, given power, money, and access to the king by his rich priory based at Clerkenwell, the five preceptories his office entitled him to, and his places in the upper house of parliament and die royal council. What use the priors made of their office and how they lived up to the ideals they were supposed to embody were, therefore, matters of consequence at the time. The surviving records, though not abundant, seem sufficient to provide partial answers to these questions for at least some priors; but no such attempt has yet been published.